Waukesha Cherry-Burrell

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Waukesha Cherry-Burrell 200 Series Centrifugal
Pump Seal School
Company Confidential
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Seal School
No, not Navy seals!
And no, not marine life.
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200 Series Centrifugal
JM MOTOR
SEAL
CASING
BACKPLATE
ADAPTER
IMPELLER
CLAMP
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200 Series Tear Down

• Lock out power.
• Disconnect suction and discharge piping
• Loosen clamp

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200 Series Tear Down
Remove Clamp
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200 Series Tear Down
Remove pump casing, may require light tapping
with soft mallet.
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200 Series Tear Down
With casing removed, unscrew impeller nut by
turning counter clock wise.
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200 Series Tear Down
Use a 9/16 wrench to remove impeller nut.
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200 Series Tear Down
With impeller nut removed, the impeller, back
plate and seal assembly can be removed by pulling
toward you. (Pumps built after July of 2004 are
fitted with an impeller nut versus bolt)
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200 Series Tear Down
Complete removal by pulling assembly off of the
motor, or bearing frame shaft. Make sure to check
shims located on motor shaft. It is not necessary
to replace shims unless they have been damaged.
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200 Series Tear Down
Place assembly impeller down on soft or non
metallic surface.
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200 Series Tear Down
Using a 1/8 allen wrench loosen both set screws
in the spring retainer.
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200 Series Tear Down
Slide spring retainer off of the impeller shaft,
using care not to lose the three springs.
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200 Series Tear Down
Remove rotary seal and o-ring.
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200 Series Tear Down
Loosen seal retainer ring using a 7/16 wrench by
turning the four bolts counter clockwise.
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200 Series Tear Down
With the four bolts removed, remove seal retainer.
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200 Series Tear Down
Remove back plate and stationary seal at the same
time.
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200 Series Tear Down
Remove stationary seal and L-gasket.
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200 Series Tear Down
Remove stationary seal from L gasket.
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200 Series Tear Down
Naked back-plate.
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200 Series Assembly
Place back plate over impeller, using care not to
drop the plate onto the impeller.
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200 Series Assembly
Install new L gasket and stationary seal. Note
stationary seal can be used on both sides.
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200 Series Assembly
Re-install seal retainer and 4 bolts. Slide
rotary seal over impeller shaft.
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200 Series Assembly
Install new rotary seal o-ring over impeller
shaft.
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200 Series Assembly
Using the spring retainer upside down press
rotary seal o-ring into place.
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200 Series Assembly
Remove spring retainer and install tabbed washer,
align tabs with flats on the rotary seal.
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200 Series Assembly
Install spring retainer with springs pointed
down. A light coat of grease or sealant can be
used to retain springs into the retainer. Align
tabs of washer onto the retainer.
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200 Series Assembly
Using a 1/8 allen wrench as a spacer, press the
sprint retainer down to compress the wrench onto
the rotary seal. While keeping pressure on the
spring retainer, remove wrench and tighten both
set screws.
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200 Series Assembly
Install splash defector with flat side toward the
motor. Install until deflector is over the end of
the impeller shaft.
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200 Series Assembly
Apply a light coat of food grade anti-seize onto
motor shaft and install complete assembly onto
the motor by aligning key and keyway.
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200 Series Assembly
Press back plate onto the motor adaptor to ensure
clearance of .030 between impeller and back
plate is obtained. Use a feeler gauge to check
clearances.
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200 Series Assembly
If clearance between impeller and back plate
needs to be adjusted, shims can be added or
removed from motor shaft.
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200 Series Assembly
Re-install impeller nut and o-ring onto shaft
stud and tighten with 9/16 wrench turning
clockwise.
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200 Series Assembly
Install causing over back plate and o-ring.
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200 Series Assembly
Install clamp and tighten, check to ensure clamp
is installed correctly by clamping both casing
and adaptor.
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200 Series Tear Down
Install piping, turn power back into operation.
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Remember One Size seal fits all 200 series pumps!
Thank you